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Special flocculant for filtering monoammonium phosphate and diammonium phosphate

A technology of diammonium phosphate and monoammonium phosphate, which is applied in the direction of separation methods, precipitation separation, chemical instruments and methods, etc., can solve the problems of increasing production, easy degradation of polyacrylamide, poor flocculation effect, etc., and achieves reduction of loss and sedimentation The effect of speed acceleration and good solubility

Inactive Publication Date: 2019-05-07
扬州科苑化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of ammonium phosphate production, due to the fine mesh of phosphate rock powder, it is difficult to separate in the process of phosphate rock paddle separation, and the efficiency is very low when evacuating in the filtration separation. Particles can improve the suction filtration efficiency, increase production, reduce slag phosphorus-containing liquid, thereby reducing costs and increasing production. During the production process of monoammonium phosphate and diammonium phosphate sedimentation, concentration and purification, high temperature and strong acidity, polyacrylamide is easy to degrade and flocculate Poor effect, loss of phosphate minerals with overflow, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Special flocculants for monoammonium phosphate and diammonium phosphate filtration,

[0024] Raw material preparation

[0025] Acrylamide 90-120kg, deionized water 45-60kg, urea 0.5-3kg, thiourea 1-4kg, 2,2 azobis(acetamidopropyl) dihydrochloride 0.001-0.009kg, ethylenediamine Sodium tetraacetate 0.001-0.008kg, ammonium persulfate 0.001-0.008kg, sodium bisulfite 0.001-0.009kg;

[0026] Raw material pretreatment

[0027] After preparing the raw materials, add them to the polymerization tank, inject high-purity nitrogen gas, and turn on the ultraviolet light to initiate polymerization. After 0.5-2 hours, it becomes a translucent rubber block;

[0028] Add the following additives after the raw materials are in the form of rubber blocks

[0029] Put the rubber block into the kneader, add 4-8kg sodium carbonate or 2-8kg sodium hydroxide, 1-8kg urea, pass steam, control the temperature at about 90-110°C, hydrolyze for 2-7 hours, and carry out granulation. Finally, it is d...

Embodiment 2

[0042] Special flocculants for monoammonium phosphate and diammonium phosphate filtration,

[0043] Raw material preparation

[0044] Acrylamide 90-120kg, deionized water 45-60kg, urea 0.5-3kg, thiourea 1-4kg, 2,2 azobis(acetamidopropyl) dihydrochloride 0.001-0.009kg, ethylenediamine Sodium tetraacetate 0.001-0.008kg, ammonium persulfate 0.001-0.008kg, sodium bisulfite 0.001-0.009kg;

[0045] Raw material pretreatment

[0046] After preparing the raw materials, add them to the polymerization tank, inject high-purity nitrogen gas, and turn on the ultraviolet light to initiate polymerization. After 0.5-2 hours, it becomes a translucent rubber block;

[0047] Add the following additives after the raw materials are in the form of rubber blocks

[0048] Put the rubber block into the kneader, add 4-8kg sodium carbonate or 2-8kg sodium hydroxide, 1-8kg urea, pass steam, control the temperature at about 90-110°C, hydrolyze for 2-7 hours, and carry out granulation. Finally, it is d...

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PUM

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Abstract

The invention relates to a special flocculant for filtering monoammonium phosphate and diammonium phosphate, wherein the raw materials comprise: 90-120 kg of acrylamide, 45-60 kg of deionized water, 0.5-3 kg of urea, 1-4 kg of thiourea, 0.001-0.009 kg of2,2azodi(acetamidinatopropyl)dihydrochloride, 0.001-0.008 kg of sodium edetate, 0.001-0.008 kg of ammonium persulfate, and 0.001-0.009 kg of sodium bisulfite. According to the present invention, the product has advantages of high molecular weight, good solubility and fast dissolution rate; and with the special flocculant, the floc sedimentationrate is accelerated, the solid concentration of the supernatant liquid is significantly reduced, and the loss of phosphate minerals along with overflow is reduced.

Description

technical field [0001] The technical field of the present invention relates to a flocculant, in particular to a special flocculant for monoammonium phosphate and diammonium phosphate filtration. Background technique [0002] In the process of ammonium phosphate production, due to the fine mesh of phosphate rock powder, it is difficult to separate in the process of phosphate rock paddle separation, and the efficiency is very low when evacuating in the filtration separation. Particles can improve the suction filtration efficiency, increase production, reduce slag phosphorus-containing liquid, thereby reducing costs and increasing production. During the production process of monoammonium phosphate and diammonium phosphate sedimentation, concentration and purification, high temperature and strong acidity, polyacrylamide is easy to degrade and flocculate The effect is poor, and the phosphate minerals are lost with the overflow. Contents of the invention [0003] The technical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D21/01C08F120/56C08F2/48
Inventor 朱定阳
Owner 扬州科苑化工有限公司
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